摘要
钙钛矿型氧化物因具有丰富的磁性、铁电、力学和光学等诸多功能属性,在电子信息通信材料器件领域中有广阔的应用前景.在各种物理性质之中,铁电极化因其产生机制多样,并能与磁性和晶格应变相互耦合形成多铁性等特点,近十多年来一直被作为凝聚态物理研究的国际热点问题.与以自发极化作为初级序参量的常规铁电材料不同,非常规铁电材料中的铁电极化是被其他的序参量诱导而产生的.本综述围绕无机钙钛矿型氧化物非常规铁电体的研究进展进行了总结.回顾了该体系经典唯象理论和原子尺度的微观模型,有序排列的人工钙钛矿超晶格型结构,以及稀土正铁氧体单晶的反铁磁畴壁结构中非常规铁电的极化强度大小及其诱导机制,为系统理解非常规铁电提供了理论途径.
Perovskite oxides show many potential applications in the research fields of emerging materials and devices for electronics, information and communication because of their rich functionalities, e.g. magnetic, ferroelectric, multiferroic,mechanical and optical properties. Among them, ferroelectricity is currently being studied intensively due to the existence of many different mechanisms, and the coupling with magnetism and strain. In contrast to the proper ferroelectricity in which the polarization is the main order parameter as the driving force, the improper ferroelectricity possesses the ferroelectric polarization that becomes a secondary order parameter induced by other orders. In this review, we focus on the inorganic perovskite oxides to summarize the recent research progress of the improper ferroelectricity in general,but we review the magnitude of polarization, and the generation mechanism of improper ferroelectricity in perovskite superlattice, double perovskite structures and a specific SmFeO3 single crystal possessing antiferromagnetic domain walls in particular. This review will hopefully provide routes to systematically understanding the improper ferroelectricity.
作者
赵国栋
杨亚利
任伟
Zhao Guo-Dong;Yang Ya-Li;Ren Wei(Department of Physics,College of Sciences,Materials Genome Institute,International Centre for Quantum and Molecular Structures,Shanghai Key Laboratory of High Temperature Superconductors,Shanghai University,Shanghai 200444,Chin)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第15期48-60,共13页
Acta Physica Sinica
基金
国家自然科学基金(批准号：51672171,11274222)
凝固技术国家重点实验室开放课题(批准号：SKLSP201703)
国家重大科学研究计划青年科学家项目(批准号：2015CB921600)
霍英东教育基金会
上海市东方学者跟踪计划资助的课题
关键词
钙钛矿
非常规铁电
超晶格
反铁磁畴壁
perovskite
improper ferroelectricity
superlattice
antiferromagnetic domain wall
作者简介
通信作者:任伟.E—mail:renwei@shu.edu.cn
